[PATCH] cciss: new disk register/deregister routines

This patch removes a couple of functions dealing with configuration and
replaces them with new functions.  This implementation fixes some bugs
associated with the ACUXE.  It also allows a logical volume to be removed from
the middle without deleting all volumes behind it.

If a user has 5 logical volumes and decides he wants to reconfigure volume
number 3, he can now do that without removing volumes 4 & 5 first.  This code
has been tested in our labs against all application software.
Signed-off-by: Chase Maupin <chase.maupin@hp.com>
Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/block/cciss.h

@@ -35,7 +35,13 @@ typedef struct _drive_info_struct
 	int 	heads;
 	int	sectors;
 	int 	cylinders;
-	int	raid_level;
+	int	raid_level; /* set to -1 to indicate that
+			     * the drive is not in use/configured
+			    */
+	int	busy_configuring; /*This is set when the drive is being removed
+				   *to prevent it from being opened or it's queue
+				   *from being started.
+				  */
 } drive_info_struct;
 
 struct ctlr_info